Zero Trust for IoT: Why “Inside the Network” Doesn’t Mean Safe Anymore
For decades, network security worked like a medieval castle. You built a big wall — the firewall. You put a gate in it — the VPN. Everything outside was dangerous. Everything inside was trusted. Once you were through the gate, you could roam freely, visit any room, open any door. That model is dead. And IoT is a big part of why it died. Fill your castle with thousands of cheap sensors, cameras, and controllers — many running outdated firmware, some with hardcoded passwords, most impossible to patch. Each one is a hole in your wall. When Mirai turned hundreds of thousands of them into an attack army, it proved the point brutally: the perimeter is meaningless when the threat is already inside, wearing a trusted uniform. 🔒 The Short Version Zero Trust rests on one foundational assumption: the network is already compromised. That sounds pessimistic. It's actually liberating. If you assume the attacker is already inside, you stop relying on the wall and start verifying ever...